[PATCH 4/4] drm/etnaviv: export client GPU usage statistics via fdinfo

[Christian König]

Am 01.07.24 um 19:14 schrieb Lucas Stach:
> This exposes a accumulated GPU active time per client via the
> fdinfo infrastructure.
>
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>

Acked-by: Christian König <christian.koenig at amd.com>

Sorry that I couldn't find time to finalize and upstream that patch set 
myself.

Regards,
Christian.

> ---
> v2:
> - new patch
> ---
>   drivers/gpu/drm/etnaviv/etnaviv_drv.c | 32 ++++++++++++++++++++++++++-
>   1 file changed, 31 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> index 6500f3999c5f..f42b982f9a16 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> @@ -24,6 +24,7 @@
>   #include "etnaviv_gem.h"
>   #include "etnaviv_mmu.h"
>   #include "etnaviv_perfmon.h"
> +#include "common.xml.h"
>   
>   /*
>    * DRM operations:
> @@ -488,7 +489,36 @@ static const struct drm_ioctl_desc etnaviv_ioctls[] = {
>   	ETNA_IOCTL(PM_QUERY_SIG, pm_query_sig, DRM_RENDER_ALLOW),
>   };
>   
> -DEFINE_DRM_GEM_FOPS(fops);
> +static void etnaviv_fop_show_fdinfo(struct seq_file *m, struct file *f)
> +{
> +	struct drm_file *file = f->private_data;
> +	struct drm_device *dev = file->minor->dev;
> +	struct etnaviv_drm_private *priv = dev->dev_private;
> +	struct etnaviv_file_private *ctx = file->driver_priv;
> +
> +	/*
> +	 * For a description of the text output format used here, see
> +	 * Documentation/gpu/drm-usage-stats.rst.
> +	 */
> +	seq_printf(m, "drm-driver:\t%s\n", dev->driver->name);
> +	seq_printf(m, "drm-client-id:\t%u\n", ctx->id);
> +
> +	for (int i = 0; i < ETNA_MAX_PIPES; i++) {
> +		struct etnaviv_gpu *gpu = priv->gpu[i];
> +
> +		if (!gpu)
> +			continue;
> +
> +		seq_printf(m, "drm-engine-pipe%d:\t%llu ns\n", i,
> +			drm_sched_entity_time_spent(&ctx->sched_entity[i]));
> +	}
> +}
> +
> +static const struct file_operations fops = {
> +	.owner = THIS_MODULE,
> +	DRM_GEM_FOPS,
> +	.show_fdinfo = etnaviv_fop_show_fdinfo,
> +};
>   
>   static const struct drm_driver etnaviv_drm_driver = {
>   	.driver_features    = DRIVER_GEM | DRIVER_RENDER,